Sethius 84 el cameanie

I have a gen1 2 bolt main 350 not exactly sure what it came from stock... I have tbi heads from a 90s Chevy truck and an edelbrock cb3 (already modified intake to fit) and a 650 cfm edelbrock 4 barrel. Will this all work together? What's the biggest cam I can run. What's going to make this run the best I have little to know money left for anything and need to get this running asap. Answers. Advice. Feed back? All is welcome. Also how much horsepower am I looking at? Also need help with choose in plugs wires and distributor. I have short headers and plan on running 40 series exhaust. Should I do single 3 inch all the way back or dudes with dumps 3 inch or two and a half? Help!